Science Review: Materials and Their Uses
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Questions and Answers

What is the conservation method that involves making less garbage?

  • Rebuild
  • Reduce (correct)
  • Recycle
  • Reuse

Which statement correctly defines reproduction?

  • The adults make offspring. (correct)
  • The offspring makes an exact copy of an adult.
  • The offspring makes the exact opposite of the adult.
  • The parents make an offspring.

Why is reproduction important to an organism?

  • Because it controls body parts.
  • Because it collects and removes waste.
  • Because it damages body parts.
  • Because it ensures continued presence of the organism. (correct)

Which part of the male reproductive system protects the testis?

<p>Scrotum (A)</p> Signup and view all the answers

What part of the female reproductive system releases the egg cells and hormones?

<p>Ovary (C)</p> Signup and view all the answers

What term marks the start of being a teenager?

<p>Adolescence (D)</p> Signup and view all the answers

What physical change might Paola have noticed on her body?

<p>Enlarged breasts (A)</p> Signup and view all the answers

What physical change did Raymond notice on Adam's neck?

<p>Physical change (A)</p> Signup and view all the answers

Which of the following changes occur in both boys and girls during puberty?

<p>II, V, and VII (B)</p> Signup and view all the answers

What type of motion does an object undergo when moving in a straight line?

<p>Rectilinear motion (D)</p> Signup and view all the answers

What is a reference point in physics?

<p>Reference point (B)</p> Signup and view all the answers

How can a biker travel a great distance in a specified time?

<p>Maintain a consistent high speed (D)</p> Signup and view all the answers

Which group of materials is used for our body?

<p>baby powder, cologne, lotion, and soap (D)</p> Signup and view all the answers

What is NOT usually added to processed food?

<p>indelible ink (A)</p> Signup and view all the answers

Which material is NOT useful for cleaning a bathroom?

<p>fabric conditioner (A)</p> Signup and view all the answers

How can you determine if a household material is harmful?

<p>Both A and B (D)</p> Signup and view all the answers

Why are metals useful?

<p>Because it is hard and can be made into different shapes (B)</p> Signup and view all the answers

When is a material considered useful?

<p>If it can serve its purpose (C)</p> Signup and view all the answers

What is the primary effect of pedaling faster on a bike?

<p>Increase the speed of the bike (D)</p> Signup and view all the answers

What is the correct unit of speed?

<p>Meter per second (B)</p> Signup and view all the answers

A car travels at a constant speed of 20 meters per second. How far will it travel in 10 seconds?

<p>200 meters (D)</p> Signup and view all the answers

What is your speed if you move 10 meters in 5 seconds?

<p>2 meters per second (D)</p> Signup and view all the answers

Which of the following materials is NOT a good conductor of heat and electricity?

<p>Rubber (D)</p> Signup and view all the answers

What is the process of breaking down of rocks into smaller pieces?

<p>Weathering (C)</p> Signup and view all the answers

What can cause rocks to break?

<p>Water that seeps into the pores and cracks of rocks (A)</p> Signup and view all the answers

How do plants serve as agents of weathering?

<p>Roots of plants that grow in rocks and cause them to break (C)</p> Signup and view all the answers

What is the effect of very strong winds of public storm signal #4 on the transportation system?

<p>It is unsafe to travel both in air and in sea (D)</p> Signup and view all the answers

What can be greatly damaged by typhoons?

<p>All of the above (D)</p> Signup and view all the answers

What is the best strategy for residents to ensure safety when a weather disturbance threatens low-lying coastal areas?

<p>Evacuate to a higher safer place (B)</p> Signup and view all the answers

What is NOT a negative effect of typhoons?

<p>It fills up dams and replenish water supply (A)</p> Signup and view all the answers

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